A. Valentine
Internet Draft Hughes Network
Systems Ltd
Document: draft-ietf-ipcdn-dvbniuif-mib-00.txt February 2001
Category: Standards Track
DVB NIU Interface MIB
for EuroModem compliant Cable Modems
Status of this Memo
This document is an Internet-Draft and is in full conformance with
all provisions of Section 10 of RFC2026.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF), its areas, and its working groups. Note that
other groups may also distribute working documents as Internet-
Drafts. Internet-Drafts are draft documents valid for a maximum of
six months and may be updated, replaced, or obsoleted by other
documents at any time. It is inappropriate to use Internet- Drafts
as reference material or to cite them other than as "work in
progress."
The list of current Internet-Drafts can be accessed at
http://www.ietf.org/ietf/1id-abstracts.txt
The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html.
Abstract
This memo defines a portion of the Management Information Base (MIB)
for use with network management protocols in the Internet community.
In particular, it defines a basic set of managed objects for SNMP-
based management of DVB interfaces in EuroModem v1.0 compliant Cable
Network Interface Units.
This memo specifies a MIB module in a manner that is compliant to
the SNMP SMIv2[RFC2578][RFC2579][RFC2580]. The set of objects is
consistent with the SNMP framework and existing SNMP standards.
This memo is a product of the DVB/DAVIC interoperability consortium
which has been adopted as a work item of the IPCDN WG. Comments are
solicited and should be addressed to the author.
1. The SNMP Management Framework
The SNMP Management Framework presently consists of five major
components:
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o An overall architecture, described in RFC 2571 [RFC2571].
o Mechanisms for describing and naming objects and events for the
purpose of management. The first version of this Structure of
Management Information (SMI) is called SMIv1 and described in
STD 16, RFC 1155 [RFC1155], STD 16, RFC 1212 [RFC1212] and RFC
1215 [RFC1215]. The second version, called SMIv2, is described
in STD 58, RFC 2578 [RFC2578], STD 58, RFC 2579 [RFC2579] and
STD 58, RFC 2580 [RFC2580].
o Message protocols for transferring management information. The
first version of the SNMP message protocol is called SNMPv1 and
described in STD 15, RFC 1157 [RFC1157]. A second version of
the SNMP message protocol, which is not an Internet standards
track protocol, is called SNMPv2c and described in RFC 1901
[RFC1901] and RFC 1906 [RFC1906]. The third version of the
message protocol is called SNMPv3 and described in RFC 1906
[RFC1906], RFC 2572 [RFC2572] and RFC 2574 [RFC2574].
o Protocol operations for accessing management information. The
first set of protocol operations and associated PDU formats is
described in STD 15, RFC 1157 [RFC1157]. A second set of
protocol operations and associated PDU formats is described in
RFC 1905 [RFC1905].
o A set of fundamental applications described in RFC 2573
[RFC2573] and the view-based access control mechanism described
in RFC 2575 [RFC2575].
A more detailed introduction to the current SNMP Management
Framework can be found in RFC 2570 [RFC2570].
Managed objects are accessed via a virtual information store, termed
the Management Information Base or MIB. Objects in the MIB are
defined using the mechanisms defined in the SMI.
This memo specifies a MIB module that is compliant to the SMIv2. A
MIB conforming to the SMIv1 can be produced through the appropriate
translations. The resulting translated MIB must be semantically
equivalent, except where objects or events are omitted because no
translation is possible (use of Counter64). Some machine readable
information in SMIv2 will be converted into textual descriptions in
SMIv1 during the translation process. However, this loss of machine
readable information is not considered to change the semantics of
the MIB.
2. Glossary
2.1. CATV
Originally "Community Antenna Television", now used to refer to any
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cable or hybrid fiber and cable system used to deliver video signals
to a community.
2.2. DAVIC
Digital Audiovisual Council. International council for
internetworking audio and video systems.
2.3. Downstream
The direction from the head-end towards the subscriber.
2.4. DVB
Digital Video Broadcasting. The DVB projects produce open and
interoperable global standards for digital audio and video
distribution.
2.5. EuroModem.
EuroModem. A specification for an interoperable European Cable
Modem [EUROM].
2.6. Head-end
The origination point in most cable systems of the subscriber video
signals. Generally also the location of the INA equipment.
2.7. INA
Interactive Network Adapter. This can act as a bridge or router in
the cable head-end. It is responsible for controlling the bandwidth
available to each NIU.
2.8. NIU
Network Interface Unit. The unit is located at the subscriber
premises and provides interactive services via the cable network.
The NIU is under the control of the INA, but may request additional
bandwidth/connections when required. The NIU can act as a bridge or
router.
2.9. QPSK Quadrature Phase Shift Keying.
A particular modulation scheme on an RF medium. See [19].
2.10. QAM Quadrature Amplitude Modulation.
A particular modulation scheme on on RF medium. Usually expressed
with a number indicating the size of the modulation constellation
(e.g. 16 QAM).
2.11. RF
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Radio Frequency.
2.12. Upstream
The direction from the subscriber towards the head-end.
3. Overview
This MIB provides a set of objects required for the management of
Euromodem compliant DVB interfaces. The specification is derived in
part from the parameters and protocols described in the Technical
Specification of a European Cable Modem for digital bi-directional
communications via cable networks [EUROM].
3.1. Structure of the MIB
This MIB is structured as three main groups:
o Management information pertinent to the MAC layer
(dvbNiuMacObjects). This group is further subdivided into a
capabilities group (dvbNiuMacCap) and statistics group
(dvbNiuMacStats).
o Management information pertinent to RF downstream
(dvbNiuDsRfObjects).
o Management information pertinent to RF upstream
(dvbNiuUsRfObjects).
The tables contained in each group can be considered extensions to
the ifEntry.
3.1.1. dvbNiuMacObjects
dvbNiuMacCapTable - This table describes which MAC capabilities are
supported by the NIU.
DvbNiuMacStatsTable - This table is used to monitor the status and
collect statistics for the MAC layer.
3.1.2. dvbNiuDsRfObjects
dvbNiuRfDsTable - This table is used to describe the RF downstream
and allows configuration of downstream channel scanning.
3.1.3. dvbNiuUsRfObjects
dvbNiuRfUsTable - This table is used to describe the RF upstream.
3.2. Relationship to the Interfaces MIB
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This section clarifies the relationship of this MIB to the
Interfaces MIB [RFC2863]. Several areas of correlation are
addressed in the following subsections. The implementer is referred
to the Interfaces MIB document in order to understand the general
intent of these areas.
3.2.1. Layering Model
An instance of ifEntry exists for each RF Downstream interface, for
each RF Upstream interface, and for each RF MAC layer. The
ifStackTable [RFC2863] MUST be implemented to identify relationships
among sub-interfaces.
The following example illustrates a MAC interface with one
downstream and two upstream channels.
| <== to network layer
+-------------+--------------+
| RF MAC |
+----+---------+-----------+-+
| | |
+---------+---+ +---+-------+ +-+---------+
| Downstream1 | | Upstream1 | | Upstream2 |
+-------------+ +-----------+ +-----------+
As can be seen from this example, the RF MAC interface is layered on
top of the downstream and upstream interfaces.
In this example, the assignment of index values could be as follows:
ifIndex ifType Description
1 dvbRccMacLayer(146) DVB CATV MAC Layer
2 dvbRccDownstream(147) DVB CATV Downstream interface
3 dvbRccUpstream(148) DVB CATV Upstream interface
4 dvbRccUpstream(148) DVB CATV Upstream interface
The corresponding ifStack entries would then be:
| IfStackHigherLayer | ifStackLowerLayer |
| 0 | 1 |
| 1 | 2 |
| 1 | 3 |
| 1 | 4 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
3.2.2. Virtual Circuits
The DVB MAC layer supports the concept of virtual circuits, but
these do not have entries in the ifTable.
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3.2.3. ifTestTable
The ifTestTable is not supported by this MIB.
3.2.4. ifRcvAddressTable
The ifRcvAddressTable is supported by this MIB only for the MAC
Layer interface.
3.2.5. ifEntry
This section documents only the differences from the requirements
specified in the Interfaces MIB. See that MIB for columns omitted
from the descriptions below.
3.2.5.1. ifEntry for Downstream interfaces
The ifEntry for Downstream interfaces supports the
ifGeneralInformationGroup and the ifPacketGroup of the Interfaces
MIB. This is an input only interface at the NIU and all output
status counters - ifOut* - will return zero.
3.2.5.1.1. ifEntry for Downstream interfaces in Cable Modems
ifTable Comments
============== ===========================================
ifIndex Each RF Cable Downstream interface is represented
by an ifEntry.
ifType The IANA value of dvbRccDownstream(147).
ifSpeed Return the speed of this downstream channel.
The returned value the raw bandwidth in bits/s
of this interface. This is the symbol rate
multiplied with the number of bits per symbol.
ifPhysAddress Return an empty string.
ifAdminStatus The administrative status of this interface.
ifOperStatus The current operational status of this interface.
ifMtu The size of the largest frame which can be
received from this interface, specified in octets.
The value includes the length of the MAC header.
ifInOctets The total number of octets received on this
interface. This includes data packets as well as
MAC layer packets, and includes the length of the
MAC header.
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ifInUcastPkts The number of Unicast packets received on this
interface. This includes data packets as well as
MAC layer packets.
ifInMulticastPkts Return the number of Multicast packets received
on this interface. This includes data packets as
well as MAC layer packets.
ifInBroadcastPkts Return the number of Broadcast packets received
on this interface. This includes data packets
as well as MAC layer packets.
ifInDiscards The total number of received packets which have
been discarded.
The possible reasons are: buffer shortage.
ifInErrors The number of inbound packets that contained
errors preventing them from being deliverable
to higher layers.
Possible reasons are: MAC FCS error.
ifInUnknownProtos The number of frames with an unknown packet type.
These are MAC frames with an unknown packet type.
ifOutOctets Return zero.
ifOutUcastPkts Return zero.
ifOutMulticastPkts
Return zero.
ifOutBroadcastPkts
Return zero.
ifOutDiscards Return zero.
ifOutErrors Return zero.
ifPromiscuousMode Refer to the Interfaces MIB.
3.2.5.2. ifEntry for Upstream interfaces
The ifEntry for Upstream interfaces supports the
ifGeneralInformationGroup and the ifPacketGroup of the Interfaces
MIB. This is an output only interface at the NIU and all input
status counters - ifIn* - will return zero.
3.2.5.2.1. ifEntry for Upstream interfaces in NIUs
ifTable Comments
============== ===========================================
ifIndex Each RF Cable Upstream interface is represented
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by an ifEntry.
ifType The IANA value of dvbRccUpstream(148).
ifSpeed Return the speed of this upstream channel.
The returned value is the raw bandwidth
in bits/s of this interface, regarding the
highest speed modulation profile that is
defined. This is the symbol rate multiplied
with the number of bits per symbol for this
modulation profile.
ifPhysAddress Return an empty string.
ifAdminStatus The administrative status of this interface.
ifOperStatus The current operational status of this
interface.
ifMtu The size of the largest frame which can be
transmitted on this interface, specified in
octets.
The value includes the length of the MAC
header.
ifInOctets Return zero.
ifInUcastPkts Return zero.
ifInMulticastPkts Return zero.
ifInBroadcastPkts Return zero.
ifInDiscards Return zero.
ifInErrors Return zero.
ifInUnknownProtos Return zero.
ifOutOctets The total number of octets transmitted on this
interface. This includes MAC packets as well as
data packets, and includes the length of the
MAC header.
ifOutUcastPkts The number of Unicast packets transmitted on this
interface. This includes MAC packets as well as
data packets.
ifOutMulticastPkts
Return the number of Multicast packets transmitted
on this interface.
This includes MAC packets as well as data packets.
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ifOutBroadcastPkts
Return the number of broadcast packets transmitted
on this interface.
This includes MAC packets as well as data packets.
ifOutDiscards The total number of outbound packets which
were discarded. Possible reasons are:
buffer shortage.
ifOutErrors The number of packets which could not be
transmitted due to errors.
ifPromiscuousMode Return false.
3.2.5.3. ifEntry for the MAC Layer
The ifEntry for the MAC Layer supports the ifGeneralInformationGroup
and the ifPacketGroup of the Interfaces MIB. This interface
provides an aggregate view of status for the lower level Downstream
and Upstream interfaces.
ifTable Comments
============== ===========================================
ifIndex Each RF Cable MAC layer entity is represented
by an ifEntry.
ifType The IANA value of dvbRccMacLayer(146).
ifSpeed Return zero.
ifPhysAddress Return the physical address of this interface.
ifAdminStatus The administrative status of this interface.
ifOperStatus The current operational status of the MAC
layer interface.
ifHighSpeed Return zero.
ifMtu Return 1500.
ifInOctets The total number of data octets received on this
interface, targeted for upper protocol layers.
ifInUcastPkts The number of Unicast packets received on this
interface, targeted for upper protocol layers.
ifInMulticastPkts Return the number of Multicast packets received
on this interface, targeted for upper protocol
layers.
ifInBroadcastPkts Return the number of Broadcast packets received
on this interface, targeted for upper protocol
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layers.
ifInDiscards The total number of received packets which have
been discarded.
The possible reasons are: buffer shortage.
ifInErrors The number of inbound packets that contained
errors preventing them from being deliverable
to higher layers.
Possible reasons are: data packet FCS error,
invalid MAC header.
ifInUnknownProtos The number of frames with an unknown packet type.
This is the number of data packets targeted for
upper protocol layers with an unknown packet type.
ifOutOctets The total number of octets, received from upper
protocol layers and transmitted on this interface.
ifOutUcastPkts The number of Unicast packets, received from upper
protocol layers and transmitted on this interface.
ifOutMulticastPkts
Return the number of Multicast packets received
from upper protocol layers and transmitted on this
interface.
ifOutBroadcastPkts
Return the number of broadcast packets received
from upper protocol layers and transmitted on this
interface.
ifOutDiscards The total number of outbound packets which
were discarded. Possible reasons are:
buffer shortage.
ifOutErrors The number of packets which could not be
transmitted due to errors.
ifPromiscuousMode Refer to the Interfaces MIB.
4. Definitions
DVB-CABLE-NIU-IF-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY,
OBJECT-TYPE,
Counter32,
Integer32,
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Gauge32,
transmission
FROM SNMPv2-SMI
TruthValue,
FROM SNMPv2-TC
SnmpAdminString
FROM SNMP-FRAMEWORK-MIB
OBJECT-GROUP,
MODULE-COMPLIANCE
FROM SNMPv2-CONF
ifIndex
FROM IF-MIB;
dvbNiuIf MODULE-IDENTITY
LAST-UPDATED "9912030000Z"
ORGANIZATION "IETF IPCDN Working Group
DVB/DAVIC Interoperability Consortium Technical
Working Group"
CONTACT-INFO
" Andrew Valentine
Postal: Engineering Design Centre
Hughes Network Systems Ltd
Saxon Street,
Linford Wood,
Milton Keynes.
MK14 6LD
ENGLAND
Tel: +44 1908 221122
Fax: +44 1908 221127
E-mail: a.valentine@eu.hns.com
IETF IPCDN Working Group
General Discussion: ipcdn@ietf.org
Subscribe: http://www.ietf.org/mailman/listinfo/ipcdn
Archive: ftp://ftp.ietf.org/ietf-mail-archive/ipcdn
Co-chairs: Richard Woundy, rwoundy@cisco.com
Andrew Valentine, a.valentine@eu.hns.com"
DESCRIPTION "The information module for the DVB interfaces
found in an EuroModem."
REVISION "9912030000Z"
DESCRIPTION "The mib has been modified to incorporate the
MAC states from dvbNiuOperStatus. These are
in dvbNiuMacStatStatus. The compliance
section has been fixed."
REVISION "9910010000Z"
DESCRIPTION "The mib has been modified to incorporate the
comments made by the WGT during the
27/28 Sep 1999 meeting. The main areas
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affected are dvbNiuMacStatsTable and
dvbNiuDsRfObjects"
REVISION "9907281500Z"
DESCRIPTION "The initial version of the MIB"
::= {transmission xx}
dvbNiuMacObjects OBJECT IDENTIFIER ::= {dvbNiuIf 1}
dvbNiuDsRfObjects OBJECT IDENTIFIER ::= {dvbNiuIf 2}
dvbNiuUsRfObjects OBJECT IDENTIFIER ::= {dvbNiuIf 3}
dvbNiuDvbIfConform OBJECT IDENTIFIER ::= {dvbNiuIf 4}
-- Define groups under dvbNiuMacObjects
dvbNiuMacCap OBJECT IDENTIFIER ::= {dvbNiuMacObjects 1}
dvbNiuMacStats OBJECT IDENTIFIER ::= {dvbNiuMacObjects 2}
-- Define groups under dvbNiuDsRfObjects
dvbNiuDsRfParam OBJECT IDENTIFIER ::= {dvbNiuDsRfObjects 1}
-- Define groups under dvbNiuUsRfObjects
dvbNiuUsRfParam OBJECT IDENTIFIER ::= {dvbNiuUsRfObjects 1}
--Define identifiers under dvbNiuDvbIfConform
dvbNiuIfCompliances OBJECT IDENTIFIER ::= {dvbNiuDvbIfConform 1}
dvbNiuIfGroups OBJECT IDENTIFIER ::= {dvbNiuDvbIfConform 2}
-- Definition of MIB objects
-- ===============================================================
-- = Mac Capabilities Group =
-- ===============================================================
-- MAC Capabilities table
dvbNiuMacCapTable OBJECT-TYPE
SYNTAX SEQUENCE OF DvbNiuMacCapEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table contains all available MAC capabilites specified
in ETS 300 800 (8/3/1999) and identifies whether they are
supported on the MAC interface."
::= { dvbNiuMacCap 1 }
dvbNiuMacCapEntry OBJECT-TYPE
SYNTAX DvbNiuMacCapEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A row provides the supported capabilities for a single MAC
interface. An entry in this table exists for each ifEntry
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with an ifType of dvbRccMacLayer."
INDEX { ifIndex }
::= { dvbNiuMacCapTable 1 }
DvbNiuMacCapEntry ::= SEQUENCE {
dvbNiuMacCapVer INTEGER,
dvbNiuMacCapEncap BITS,
dvbNiuMacCapResReqCap TruthValue,
dvbNiuMacCapFragMacMess TruthValue,
dvbNiuMacCapSecSupp TruthValue,
dvbNiuMacCapMinislots TruthValue,
dvbNiuMacCapIbSig TruthValue,
dvbNiuMacCapOobSig TruthValue,
dvbNiuMacCapDsOobBr BITS,
dvbNiuMacCapUsBr BITS,
dvbNiuMacCapMaxConn Gauge32,
dvbNiuMacCapOperation INTEGER
}
dvbNiuMacCapVer OBJECT-TYPE
SYNTAX INTEGER {
davic11(1),
davic12(2),
en301199(20),
ets300800v2(29),
ets300800v1(30)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The mac protocol version."
::= { dvbNiuMacCapEntry 1 }
dvbNiuMacCapEncap OBJECT-TYPE
SYNTAX BITS {
directIp(0),
ethernetMacBridge(1),
ppp(2)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This field is used to identify the encapsulation
types supported. These can be direct IP, Ethernet MAC
bridging and PPP."
::= { dvbNiuMacCapEntry 2 }
dvbNiuMacCapResReqCap OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
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"True if the NIU is able to send MAC Resource Request
Messages."
::= { dvbNiuMacCapEntry 3 }
dvbNiuMacCapFragMacMess OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"True if the NIU supports fragemented MAC messages."
::= { dvbNiuMacCapEntry 4 }
dvbNiuMacCapSecSupp OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"True if the NIU supports the security extensions defined
in ETS 300 800."
::= { dvbNiuMacCapEntry 5 }
dvbNiuMacCapMinislots OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"True if the NIU is capable of utilising minislots."
::= { dvbNiuMacCapEntry 6 }
dvbNiuMacCapIbSig OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"True if the NIU is capable of utilising in band
signalling."
::= { dvbNiuMacCapEntry 7 }
dvbNiuMacCapOobSig OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"True if the NIU is capable of utilising out of band
signalling."
::= { dvbNiuMacCapEntry 8 }
dvbNiuMacCapDsOobBr OBJECT-TYPE
SYNTAX BITS {
d1o544Mbit(0),
d3o088Mbit(1)
}
MAX-ACCESS read-only
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STATUS current
DESCRIPTION
"This field is used to identify the downstream out of band
bit rates supported. These are 1.544Mbit/s and 3.088Mbit/s.
If dvbNiuMacCapOobSig is false then the value of this
Object will be zero."
::= { dvbNiuMacCapEntry 9 }
dvbNiuMacCapUsBr OBJECT-TYPE
SYNTAX BITS {
u256kbit(0),
u1o544Mbit(1),
u3o88Mbit(2),
u6o176Mbit(3)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This field is used to identify the upstream bit rates
supported. These are 256kbit/s, 1.544Mbit/s, 3.088Mbit/s
and 6.176Mbit/s."
::= { dvbNiuMacCapEntry 10 }
dvbNiuMacCapMaxConn OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The maximum number of connections supported by the NIU."
::= { dvbNiuMacCapEntry 11 }
dvbNiuMacCapOperation OBJECT-TYPE
SYNTAX INTEGER {
one-way(1),
two-way(2)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The operational mode of the NIU, this can be either
one-way or two-way."
::= { dvbNiuMacCapEntry 12 }
-- End of MAC capabilities table
-- ===============================================================
-- = Mac Statistics Group =
-- ===============================================================
-- MAC Statistics table
dvbNiuMacStatsTable OBJECT-TYPE
SYNTAX SEQUENCE OF DvbNiuMacStatsEntry
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MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table contains statistics/status associated with the
MAC interface. Reading these statistics does not cause
the values to be reset. If the statistics are read via a
MAC message they will be reset!
Note: The error statistics are represented by only 16 bits,
this is because the status message only uses 16 bits for
the values."
::= { dvbNiuMacStats 1 }
dvbNiuMacStatsEntry OBJECT-TYPE
SYNTAX DvbNiuMacStatsEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A row provides the statistics/status for a single MAC
interface. An entry in this table exists for each ifEntry
with an ifType of dvbRccMacLayer."
INDEX { ifIndex }
::= { dvbNiuMacStatsTable 1 }
DvbNiuMacStatsEntry ::= SEQUENCE {
dvbNiuMacHwVer SnmpAdminString,
dvbNiuMacStatStatus INTEGER,
dvbNiuMacStatSlotCfgCrcErrs Gauge32,
dvbNiuMacStatRsCorrErrs Gauge32,
dvbNiuMacStatATMPacketLosses Gauge32,
dvbNiuMacStatSlotConfigCount Gauge32,
dvbNiuMacStatSlEsfCrcErrs Gauge32,
dvbNiuMacStatRsErrCorrFrms Gauge32,
dvbNiuMacStatRsErrNonCorrFrms Gauge32,
dvbNiuMacStatSlEsfFrameCount Gauge32,
dvbNiuMacStatConCount Gauge32,
}
dvbNiuMacHwVer OBJECT-TYPE
SYNTAX SnmpAdminString
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The hardware version of the MAC interface. The is a free
format text field."
::= { dvbNiuMacStatsEntry 1 }
dvbNiuMacStatStatus OBJECT-TYPE
SYNTAX INTEGER {
scanningForCarrier(1),
provisioning(2),
invalidSTBNIU(3),
timingRangingError(4),
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powerRangingError(5),
running(6),
stopped(7),
none(8),
other(9)
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The operational status of the NIU. The statuses 1-8 are
from ETS 300 800. The status other(9) is used for any case
that is not explicitly identified"
::= { dvbNiuMacStatsEntry 2 }
dvbNiuMacStatSlotCfgCrcErrs OBJECT-TYPE
SYNTAX Gauge32 (0..65535)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Counts the number of errors in Slot_Configuration_Count
R bytes, as found by the CRC decoder. This object is
initialized to 0 at boot and is reset only upon reboot or
by a MAC Status message."
::= { dvbNiuMacStatsEntry 3 }
dvbNiuMacStatRsCorrErrs OBJECT-TYPE
SYNTAX Gauge32 (0..65535)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Counts the number of errors as corrected by the Reed
Solomon decoder. This object is initialized to 0 at boot
and is reset only upon reboot or by a MAC Status message."
::= { dvbNiuMacStatsEntry 4 }
dvbNiuMacStatATMPacketLosses OBJECT-TYPE
SYNTAX Gauge32 (0..65535)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Counts the number of received ATM cells that were lost,
either due to unrecoverable Reed Solomon errors or because
of an erroneous HEC of the ATM cells header. This object
is initialized to 0 at boot and is reset only upon reboot
or by a MAC Status message."
::= { dvbNiuMacStatsEntry 5 }
dvbNiuMacStatSlotConfigCount OBJECT-TYPE
SYNTAX Gauge32 (0..65535)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This refers to the number of R-byte sets (Rxa-Rxc) used to
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calculate Slot_Configuration_CRC_Error_Count."
::= { dvbNiuMacStatsEntry 6 }
dvbNiuMacStatSlEsfCrcErrs OBJECT-TYPE
SYNTAX Gauge32 (0..65535)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Counts the number of CRC errrors found in consecutive
C1-C6.
This object is initialized to 0 at boot and is reset only
upon reboot or by a MAC Status message."
::= { dvbNiuMacStatsEntry 7 }
dvbNiuMacStatRsErrCorrFrms OBJECT-TYPE
SYNTAX Gauge32 (0..65535)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Counts the number of MPEG frames received with correctable
Reed Solomon errors (IB only). This object is initialized
to 0 at boot and is reset only upon reboot or by a MAC
Status message."
::= { dvbNiuMacStatsEntry 8 }
dvbNiuMacStatRsErrNonCorrFrms OBJECT-TYPE
SYNTAX Gauge32 (0..65535)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Counts the number of MPEG frames received with non
correctable Reed Solomon errors (IB only). This object is
initialized to 0 at boot and is reset only upon reboot or
by a MAC Status message."
::= { dvbNiuMacStatsEntry 9 }
dvbNiuMacStatSlEsfFrameCount OBJECT-TYPE
SYNTAX Gauge32 (0..65535)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This is the number of frames the statistics in this message
apply on."
::= { dvbNiuMacStatsEntry 10 }
dvbNiuMacStatConCount OBJECT-TYPE
SYNTAX Gauge32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of active connections."
::= { dvbNiuMacStatsEntry 11 }
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-- End of MAC statistics table
-- ===============================================================
-- = Downstream RF Parameters Group =
-- ===============================================================
-- Downstream RF parameters table
dvbNiuRfDsTable OBJECT-TYPE
SYNTAX SEQUENCE OF DvbNiuRfDsEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table contains RF characteristcs and counters for the
downstream interfaces. "
::= { dvbNiuDsRfParam 1 }
dvbNiuRfDsEntry OBJECT-TYPE
SYNTAX DvbNiuRfDsEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A row provides the RF characteristcs, counters and possible
frequencies to use when locating a downstream channel for a
single downstream RF interface. An entry in this
table exists for each ifEntry with an ifType of
dvbRccDownstream"
INDEX { ifIndex }
::= { dvbNiuRfDsTable 1 }
DvbNiuRfDsEntry ::= SEQUENCE {
dvbNiuRfDsHwVer SnmpAdminString,
dvbNiuRfDsLastGoodFreq Integer32,
dvbNiuRfDsBackupFreq Integer32,
dvbNiuRfDsLowScanFreq Integer32,
dvbNiuRfDsHighScanFreq Integer32,
dvbNiuRfDsScanStep Integer32,
dvbNiuRfDsOobFreq Integer32,
dvbNiuRfDsIbFreq Integer32,
dvbNiuRfDsModType INTEGER,
dvbNiuRfDsSnrEst Integer32,
dvbNiuRfDsPwrLevelEst Integer32
}
dvbNiuRfDsHwVer OBJECT-TYPE
SYNTAX SnmpAdminString
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The hardware version of the downstream RF interface. The
is a free format text field."
::= { dvbNiuRfDsEntry 1 }
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dvbNiuRfDsLastGoodFreq OBJECT-TYPE
SYNTAX Integer32 (47000000..1000000000)
UNITS "Hz"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This is the last known good frequency for a downstream
channel and is used to locate the channel on power up or
reset. If a downstream channel cannot be found at the
frequency held by this object then dvbNiuRfDsBackupFreq
is tried. If dvbNiuRfDsBackupFreq fails then a frequency
scan is performed between dvbNiuRfDsMinScanFreq and
dvbNiuRfDsMaxScanFreq with a step size of
dvbNiuRfDsScanStep
This object will be updated with the freguency of the
channel found using the alternative frequencies."
DEFVAL { 650000000 }
::= { dvbNiuRfDsEntry 2 }
dvbNiuRfDsBackupFreq OBJECT-TYPE
SYNTAX Integer32 (47000000..1000000000)
UNITS "Hz"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This is a backup frequency for the downstream channel.
This will be used if dvbNiuRfDsLastGoodFreq fails. If this
frequency is successfully used then dvbNiuRfDsLastGoodFreq
is updated to contain it. If dvbNiuRfDsBackupFreq fails
then a frequency scan is performed between
dvbNiuRfDsMinScanFreq and dvbNiuRfDsMaxScanFreq with a step
size of dvbNiuRfDsScanStep."
DEFVAL { 450000000 }
::= { dvbNiuRfDsEntry 3 }
dvbNiuRfDsLowScanFreq OBJECT-TYPE
SYNTAX Integer32 (47000000..1000000000)
UNITS "Hz"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This is the start of the frequency range to be used
for scanning to find a downstream channel. If a downstream
channel is found then dvbNiuRfDsLastGoodFreq is updated to
contain the new frequency and the scan is terminated.
The step size used for the scan is dvbNiuRfDsScanStep."
DEFVAL { 110000000 }
::= { dvbNiuRfDsEntry 4 }
dvbNiuRfDsHighScanFreq OBJECT-TYPE
SYNTAX Integer32 (47000000..1000000000)
UNITS "Hz"
MAX-ACCESS read-write
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DVB NIU Interface MIB February 2001
STATUS current
DESCRIPTION
"This is the end of the frequency range to be used for
scanningscan to find a downstream channel. If a downstream
channel is found then dvbNiuRfDsLastGoodFreq is updated to
contain the new frequency and the scan is terminated.
The step size used for the scan is dvbNiuRfDsScanStep."
DEFVAL { 862000000 }
::= { dvbNiuRfDsEntry 5 }
dvbNiuRfDsScanStep OBJECT-TYPE
SYNTAX Integer32 (47000000..1000000000)
UNITS "Hz"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This is the step size to be used when scanning for a
downstream channel."
DEFVAL { 62500 }
::= { dvbNiuRfDsEntry 6 }
dvbNiuRfDsOobFreq OBJECT-TYPE
SYNTAX Integer32 (47000000..1000000000)
UNITS "Hz"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The frequency of the current downstream out of band
channel."
::= { dvbNiuRfDsEntry 7 }
dvbNiuRfDsIbFreq OBJECT-TYPE
SYNTAX Integer32 (47000000..1000000000)
UNITS "Hz"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The frequency of the current downstream in band channel."
::= { dvbNiuRfDsEntry 8 }
dvbNiuRfDsModType OBJECT-TYPE
SYNTAX INTEGER {
qpsk(2),
qam8(3),
qam16(4),
qam32(5),
qam64(6),
qam128(7),
qam256(8)
}
MAX-ACCESS read-only
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DVB NIU Interface MIB February 2001
STATUS current
DESCRIPTION
"The modulation type of the downstream channel."
::= { dvbNiuRfDsEntry 9 }
dvbNiuRfDsSnrEst OBJECT-TYPE
SYNTAX Integer32 (0..255)
UNITS "dB*2"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The estimated signal to noise ratio of the downstream
carrying MAC messages. If the SNR cannot be estinmated
it will be 0."
::= { dvbNiuRfDsEntry 10 }
dvbNiuRfDsPwrLevelEst OBJECT-TYPE
SYNTAX Integer32 (0..255)
UNITS "dBuV*2"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The estimated power level of the downstream carrying
MAC messages. If the power level cannot be estinmated
it will be 0."
::= { dvbNiuRfDsEntry 11 }
-- End of downstream parameters table
-- ===============================================================
-- = Upstream RF Parameters Group =
-- ===============================================================
-- Upstream RF parameters table
dvbNiuRfUsTable OBJECT-TYPE
SYNTAX SEQUENCE OF DvbNiuRfUsEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table contains RF characteristcs and counters for the
upstream interfaces."
::= { dvbNiuUsRfParam 1 }
dvbNiuRfUsEntry OBJECT-TYPE
SYNTAX DvbNiuRfUsEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A row provides the RF characteristcs and counters for a
single upstream RF interface. An entry in this table
exists for each ifEntry with an ifType of dvbRccUpstream"
INDEX { ifIndex }
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::= { dvbNiuRfUsTable 1 }
DvbNiuRfUsEntry ::= SEQUENCE {
dvbNiuRfUsHwVer SnmpAdminString,
dvbNiuRfUsFreq Integer32,
dvbNiuRfUsPwrCtrlSetting Integer32,
dvbNiuRfUsTimeOffsetValue Integer32
}
dvbNiuRfUsHwVer OBJECT-TYPE
SYNTAX SnmpAdminString
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The hardware version of the upstream RF interface. The
is a free format text field."
::= { dvbNiuRfUsEntry 1 }
dvbNiuRfUsFreq OBJECT-TYPE
SYNTAX Integer32 (5000000..65000000)
UNITS "Hz"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The frequency of the upstream channel."
::= { dvbNiuRfUsEntry 2 }
dvbNiuRfUsPwrCtrlSetting OBJECT-TYPE
SYNTAX Integer32 (0..255)
UNITS "dBuV*2"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The actual power used for the upstream transmission. The
unit of measure is 0.5dBuV"
::= { dvbNiuRfUsEntry 3 }
dvbNiuRfUsTimeOffsetValue OBJECT-TYPE
SYNTAX Integer32 (-32768..32767)
UNITS "100nsec"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This represents a relative offset of the upstream
transmission timing. A negative value indicates an
adjustment forward in time. A positive value indicates
an adjustment back in time. The unit of measure is 100
nsec"
::= { dvbNiuRfUsEntry 4 }
-- End of upstream parameters table
-- Conformance statements
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DVB NIU Interface MIB February 2001
dvbNiuIfCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"The compliance statement for EuroModem NIUs
which implement the DVB-CABLE-NIU-IF-MIB MIB."
MODULE -- dvbNiuIf
MANDATORY-GROUPS { dvbNiuMacGroup,
dvbNiuDsRfParamGroup,
dvbNiuUsRfParamGroup
}
::= { dvbNiuIfCompliances 1 }
dvbNiuMacGroup OBJECT-GROUP
OBJECTS {
dvbNiuMacHwVer,
dvbNiuMacStatStatus,
dvbNiuMacStatSlotCfgCrcErrs,
dvbNiuMacStatRsCorrErrs,
dvbNiuMacStatATMPacketLosses,
dvbNiuMacStatSlotConfigCount,
dvbNiuMacStatSlEsfCrcErrs,
dvbNiuMacStatRsErrCorrFrms,
dvbNiuMacStatRsErrNonCorrFrms,
dvbNiuMacStatSlEsfFrameCount,
dvbNiuMacStatConCount,
dvbNiuMacCapOobSig,
dvbNiuMacCapVer,
dvbNiuMacCapEncap,
dvbNiuMacCapMaxConn,
dvbNiuMacCapUsBr,
dvbNiuMacCapOperation,
dvbNiuMacCapDsOobBr,
dvbNiuMacCapResReqCap,
dvbNiuMacCapFragMacMess,
dvbNiuMacCapSecSupp,
dvbNiuMacCapMinislots,
dvbNiuMacCapIbSig
}
STATUS current
DESCRIPTION
"A collection of objects providing capabilities and
statistics for the MAC layer."
::= { dvbNiuIfGroups 1 }
dvbNiuDsRfGroup OBJECT-GROUP
OBJECTS {
dvbNiuRfDsHwVer,
dvbNiuRfDsLastGoodFreq,
dvbNiuRfDsBackupFreq,
dvbNiuRfDsLowScanFreq,
dvbNiuRfDsHighScanFreg,
dvbNiuRfDsScanStep,
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DVB NIU Interface MIB February 2001
dvbNiuRfDsOobFreq,
dvbNiuRfDsIbFreq,
dvbNiuRfDsModType,
dvbNiuRfDsSnrEst,
dvbNiuRfDsPwrLevelEst
}
STATUS current
DESCRIPTION
"A collection of objects providing capabilities and
statistics for the downstream RF interface."
::= { dvbNiuIfGroups 2 }
dvbNiuUsRfGroup OBJECT-GROUP
OBJECTS {
dvbNiuRfUsHwVer,
dvbNiuRfUsFreq,
dvbNiuRfUsPwrCtrlSetting,
dvbNiuRfUsTimeOffsetValue
}
STATUS current
DESCRIPTION
"A collection of objects providing capabilities and
statistics for the upstream RF interface."
::= { dvbNiuIfGroups 3 }
END
5. Security Considerations
This MIB relates to a system which will provide metropolitan public
internet access. As such, improper manipulation of the objects
represented by this MIB may result in denial of service to a large
number of end-users.
There are a number of management objects defined in this MIB that
have a MAX-ACCESS clause of read-write and/or read-create. Such
objects may be considered sensitive or vulnerable in some network
environments. The support for SET operations in a non-secure
environment without proper protection can have a negative effect on
network operations. In addition to those mentioned above:
o dvbNiuRfDsBackupFreq, dvbNiuRfDsHighScanFreq,
dvbNiuRfDsScanStep and dvbNiuRfDsLowScanFreq can be manipulated
to prevent the NIU from acquiring and locking on to the
downstream channel, thus resulting in denial of service.
This MIB does not affect confidentiality of services on a cable
system.
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DVB NIU Interface MIB February 2001
SNMPv1 by itself is not a secure environment. Even if the network
itself is secure (for example by using IPSec), even then, there is
no control as to who on the secure network is allowed to access and
GET/SET (read/change/create/delete) the objects in this MIB. It is
recommended that the implementers consider the security features as
provided by the SNMPv3 framework. Specifically, the use of the User-
based Security Model RFC 2574 [RFC2574] and the View- based Access
Control Model RFC 2575 [RFC2575] is recommended.
It is then a customer/user responsibility to ensure that the SNMP
entity giving access to an instance of this MIB, is properly
configured to give access to the objects only to those principals
(users) that have legitimate rights to indeed GET or SET
(change/create/delete) them.
6. References
[RFC2571] Harrington, D., Presuhn, R., and B. Wijnen,
"An Architecture for Describing SNMP Management
Frameworks", RFC 2571, April 1999.
[RFC1155] Rose, M., and K. McCloghrie,
"Structure and Identification of Management Information
for TCP/IP-based Internets", STD 16, RFC 1155, May 1990.
[RFC1212] Rose, M., and K. McCloghrie,
"Concise MIB Definitions", STD 16, RFC 1212, March 1991.
[RFC1215] M. Rose,
"A Convention for Defining Traps for use with the SNMP",
RFC 1215, March 1991.
[RFC2578] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case,J.,
Rose, M., and S. Waldbusser, "Structure of Management
Information Version 2 (SMIv2)", STD 58, RFC 2578, April
1999.
[RFC2579] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case,
J., Rose, M., and S. Waldbusser, "Textual Conventions
for SMIv2", STD 58, RFC 2579, April 1999.
[RFC2580] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case,
J., Rose, M., and S. Waldbusser, "Conformance Statements
for SMIv2", STD 58, RFC 2580, April 1999.
[RFC1157] Case, J., Fedor, M., Schoffstall, M., and J. Davin,
"Simple Network Management Protocol", STD 15, RFC 1157,
May 1990.
[RFC1901] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser,
"Introduction to Community-based SNMPv2", RFC 1901,
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DVB NIU Interface MIB February 2001
January 1996.
[RFC1906] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser,
"Transport Mappings for Version 2 of the Simple Network
Management Protocol (SNMPv2)", RFC 1906, January 1996.
[RFC2572] Case, J., Harrington D., Presuhn R., and B. Wijnen,
"Message Processing and Dispatching for the Simple
Network Management Protocol (SNMP)", RFC 2572, April
1999.
[RFC2574] Blumenthal, U., and B. Wijnen, "User-based Security
Model (USM) for version 3 of the Simple Network
Management Protocol (SNMPv3)", RFC 2574, April 1999.
[RFC1905] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser,
"Protocol Operations for Version 2 of the Simple Network
Management Protocol (SNMPv2)", RFC 1905, January 1996.
[RFC2573] Levi, D., Meyer, P., and B. Stewart, "SNMPv3
Applications", RFC 2573, April 1999.
[RFC2575] Wijnen, B., Presuhn, R., and K. McCloghrie, "View-based
Access Control Model (VACM) for the Simple Network
Management Protocol (SNMP)", RFC 2575, April 1999.
[RFC2570] Case, J., Mundy, R., Partain, D., and B. Stewart,
"Introduction to Version 3 of the Internet-standard
Network Management Framework", RFC 2570, April 1999.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC2863] McCloghrie, K. and F. Kastenholz, "The Interfaces Group
MIB", June 2000
[EUROM] ECCA,"Technical Specification of a European Cable Modem
for digital bi-directional communications via cable
networks", Version 1.0, 12th May 1999
7. Acknowledgments
This MIB was the result of the work undertaken by DVB/DAVIC
Interoperability consortium to define a common management interface
for EuroModem compliant NIU.
RFC 2670 edited by Michael St Johns was used as the template for
this document.
8. Author's Addresses
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DVB NIU Interface MIB February 2001
Andrew Valentine
Engineering Design Centre
Hughes Network Systems Ltd
Saxon Street,
Linford Wood,
Milton Keynes.
MK14 6LD
ENGLAND
Phone: +44 1908 221122
Email: a.valentine@eu.hns.com
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DVB NIU Interface MIB February 2001
Full Copyright Statement
Copyright (C) The Internet Society (2000). All Rights Reserved.
This document and translations of it may be copied and furnished to
others, and derivative works that comment on or otherwise explain it
or assist in its implementation may be prepared, copied, published
and distributed, in whole or in part, without restriction of any
kind, provided that the above copyright notice and this paragraph
are included on all such copies and derivative works. However, this
document itself may not be modified in any way, such as by removing
the copyright notice or references to the Internet Society or other
Internet organizations, except as needed for the purpose of
developing Internet standards in which case the procedures for
copyrights defined in the Internet Standards process must be
followed, or as required to translate it into languages other than
English.
The limited permissions granted above are perpetual and will not be
revoked by the Internet Society or its successors or assigns.
This document and the information contained herein is provided on an
"AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION
HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
Acknowledgement
Funding for the RFC Editor function is currently provided by the
Internet Society.
Valentine Expires August 2001 29
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